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Gao Jinming; Li Wei; Lu Jie; Xia Zhiwei; Yi Ping; Liu Yi; Yang Qingwei, E-mail: gaojm@swip.ac.cn
HL-2A Team2016
HL-2A Team2016
AbstractAbstract
[en] An infrared imaging bolometer diagnostic has been upgraded recently to be adapted for the complications of the signal-to-noise ratio arising from the low level of plasma radiation and high reflectivity of low energy photon (<6.2 eV). It utilizes a platinum foil, blackened on both sides with graphite spray, as the bolometer detector. The advantage of the blackened foil is the light absorption extending into the infrared. After a careful calibration of the foil, the incident power density distribution on the foil is determined by solving the heat diffusion equation with a numerical technique. The local plasma radiated power density is reconstructed with a minimum fisher information regularization method by assuming plasma emission toroidal symmetry. Comparisons of the results and the profiles measured by an ordinary bolometric detector demonstrate that this method is good enough to provide the plasma radiated power pattern. The typical plasma radiated power density distribution before and after high mode (H-mode) transition is firstly reconstructed with the infrared imaging bolometer. Moreover, during supersonic molecular beam injection (SMBI), an enhanced radiation region is observed at the edge of the plasma. (paper)
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Source
Available from http://dx.doi.org/10.1088/1009-0630/18/6/02; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Plasma Science and Technology; ISSN 1009-0630;
; v. 18(6); p. 590-594

Country of publication
BEAMS, BOSONS, CARBON, CONFINEMENT, DIFFERENTIAL EQUATIONS, DIMENSIONLESS NUMBERS, ELECTROMAGNETIC RADIATION, ELEMENTARY PARTICLES, ELEMENTS, ENERGY, EQUATIONS, MAGNETIC CONFINEMENT, MASSLESS PARTICLES, METALS, MINERALS, NONMETALS, OPTICAL PROPERTIES, PARTIAL DIFFERENTIAL EQUATIONS, PHYSICAL PROPERTIES, PLASMA CONFINEMENT, PLATINUM METALS, RADIATIONS, SORPTION, SURFACE PROPERTIES, TRANSITION ELEMENTS
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